Lock for set-screws.



PATBNTED JUNBz.- .1961.

I A m, m v w k Sw -m -m s w .mm IJ; .w

N n) 1 unnuuun S 0 W E m IIlI; N.S l N R III E M L WSH C Wm Il IIIIII. FE K m nU o L recess 6.

NITED STATES HARRY C. WERNER, OF WHEELING, WEST VIRGINIA.

LOCK FOR SET-SCREWS.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed October 5, 1906. Serial No. 337,534.

T0 all whom t muy concern: f

Be it known that I, HARRY C. WERNER, a citizen of the United States ofAmerica, and a resident of `Wheeling, county of Ohio, and State of VestVirginia, have invented certain new and useful Improvements in Locks forSet-Screws, of which the following is a specification.

My invention relates to new and useful improvements in locks forset-screws, and more particularly to a device for locking setscrewsagainst retraction; and it consists in the particular construction,arrangement and combination of parts which will hereinafter be fullydescribed.

The object of the invention is toprovide a simple, cheap and efficientdevice by means of which fly-wheels and the like may be secured againstrotation on their shafts.

A further object of the invention is to provide a device for positivelylocking ily-wheel set-screws in impinging relation to the iiywheelshafts, preventing the retraction of said set-screws.

In describing the invention in detail, reference is herein had to theaccompanying drawings, forming a part of this speciiication, in which--Figure 1 is a vertical section of a fly-wheel, showing my inventionapplied thereto; Fig, 2 is a similar section of a iiy-wheel hub,enlarged, more clearly illustrating the invention and in Fig. 3 isillustrated respectively a side view, a rear edge view and a front edgeview of the key.

Referring to said drawings, in which like reference numerals designatelike parts throughout theseveral views-1 indicates a iiy-wheel, v2 theshaft on which said wheel 'is mounted, and 3 the set-screw which isscrewed through the hub 4 of the wheel to impinge upon the shaft forholding said wheel in fixed relation to said shaft.

In the hub 4, at one side of the threaded hole 5 through which theset-screw 3 is projected, is an inwardly inclined recess 6 which is inopen communication throughout its length with said hole 5, and seated insaid recess is a key 7, the lower end 8 of which is substantiallywedge-shaped, having its rear wall 9 inclined to substantiallycorrespond with the inclination of the rear wall 10 of the The frontedge of the wedgeshaped end 8 of the key is beveled to a longitudinalvertical edge 11 which stands in opposing relation Yto the threads ofthe setscrew 3 and which is adapted to cut into said threads upon theapplication of pressure to 'toward the key. When it engages the key,

the lower face of the nut slides over the forwardly directed bevel 13,gradually forcing said key inward in the recess and causing the bevelededge 11 to sink into the threads of the set-screw, thus preventing theretraction of said set-screw. Retraction of the nut 15 is prevented bythe edge 13 of the key, which cuts into the face of the nut upon anyslight rearward movement of the latter.

When for any reason it is desired to remove the set-screw, the edge of achisel or like edge-tool is inserted behind the key 7 in the angleformed by the beveled edge 13 and the nut 15; then, upon striking saidtool a blow, said key is further s rung into the recess, disengaging thenut t erefrom. Vhen the nut has been sufficiently retracted, the

key may be conveniently removed. after stroking it lightly on oppositesides to loosen its hold on the threads of the set-screw.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1.4 In a device of the `character described, a set-screw mounted in thehub of a wheel in impinging relation to the shaft, a tapered key mountedin an inwardly inclined recess provided insaid hub which recessis incommunication throughout its lengthwith the set-screw hole, said keyhaving a beveled edge in opposing relation to the threads of theset-screw, a nut carried by said set-screw between its head and theoutwardly projecting end of said key whereby said key is forced inwardin said recess, and means carried by said projecting end whereby saidnut is held against retraction.

2. In a lock for set-screws, a set-screw projected through the hub ofthe wheel and having its point impinging upon the wheel shaft, a keyseated in an inclined recess provided in roo IIO

said hub, which recess is in Open communication with the screw-hole, therear wall of said key being inclined to corres ond with the inclinationof the recess7 said rey having a beveled edge adapted to sink into thethreads of said set-screw upon the application of pressure to the outerend of the key, the outer end of the key projecting beyond said recessand having a forwardly directed bevel radial to said set-screw, and anadjustable nut carried by said set-screw in binding engagement with saidradial bevel.

3. In a device of the character described, the combination with aset-screw mounted in a wheel-hub in impinging relation to its shaft,y ofa wedge-shaped key mounted in said hub substantially parallel to theset-screw7 said key having a beveled edge in opposing relation to thethreads of the set-screw and have ing its outer end projected beyond theJface of the hub, said outer end having a bevel substantially radial tosaid set-screw, and a nut carried by said set-screw, said nut beingadapted to be manipulated to force said key inward intothread-mutilating engagement with the set-screw and to be held againstretraction on said set-screw by the radially directed bevel of the key.

In testimony whereof I affix my signature in presence of two subscribingwitnesses.

HARRY C. VERNER. Witnesses H; E. DUNLAP, ROBT. F. DiLwoRTn.

